GrainGenes Reference Report: PEN-32-1357
Reference
PEN-32-1357
Title
The involvement of aquaglyceroporins in transport of boron in barley roots.
Journal
Plant, Cell and Environment
Year
2009
Volume
32
Pages
1357-1365
Author
Fitzpatrick KL Reid RJ
Abstract
Boron (B) enters cells as the uncharged boric acid, a small neutral molecule with sufficient lipid solubility to cross cell membranes without the aid of transport proteins. The extent to which the observed uptake rates for B in plants can be explained by this simple physical process was examined by applying treatments expected to inhibit the membrane transporters most likely to be involved in B transport. These experiments established that at least 50% of B uptake could be facilitated by transporters. The B transport characteristics of two barley aquaglyceroporins, HvPIP1;3 and HvPIP1;4, were investigated using yeast complementation assays. Expression of both genes in yeast resulted in increased B sensitivity. Transport assays in yeast confirmed that HvPIP1;3 and HvPIP1;4 are both capable of transporting B. The physiological role of these HvPIP1 genes in B transport is uncertain since their expression was not responsive to B nutritional status, and they continued to be expressed under toxicity conditions.
External Databases
http://dx.doi.org/10.1111/j.1365-3040.2009.02003.x
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: PEN-32-1357
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||